Tool for wristwatch

ABSTRACT

Substantially cylindrical head tube body, center tube body and tip tube body threadedly engage each other to thereby construct a tool main body of a tool for wristwatch. The through hole of the center tube body is provided with a partition part having a small-diameter hole and slant face. A hammering member and compression spring are slidably accommodated in the through hole. A trigger shaft includes a small-diameter part which can be inserted in a center hole of the hammering member, and a large-diameter part continuing therefrom through the slant face, which can pass through the small-diameter hole. A deformed coil spring has the large-diameter part of the trigger shaft fitted therein in wound form, and energizes the trigger shaft toward sliding shaft while slanting the trigger shaft so as to cause the small-diameter part to shift toward the inside wall of the tool main body. The sliding shaft at its rear end includes large-diameter head part and at its front end includes an engagement part to which a wristwatch tool component can be replaceably fixed. The engagement part interlocks a small-diameter hole of the tip tube body with a play, and the front end of the engagement part protrudes from the tip tube body.

TECHNICAL FIELD

The present invention relates to a wristwatch tool for removing a bandconnecting pin, a case back, and other exterior parts of a wristwatch.

DESCRIPTION OF THE PRIOR ART

Among the common wristwatch bands, there are those having a plurality ofband pieces or links connected to each other by means of band connectingpins. In these common wristwatch bands, the number of band pieces orlinks is regulated by removing or inserting band connecting pins, sothat the band length can be adjusted. These band connecting pins removedor inserted are called adjust pins. Further, the band connecting pinsare also used to connect a band center buckle. The band connecting pinsare buried in, for example, band pieces or links, so that a specialpurpose band connecting pin removing tool is needed for removingoperation therefor.

An example of a conventional general band connecting pin removing tool,is disclosed in, for example, Japanese Utility Model Registration No.2522973. An outline thereof is as follows. A band cradle having sidewall portions at its two bottom ends is provided. A rotatable slidingshaft is disposed at one side wall portion of the band cradle. A grooveis formed on the other side wall portion of the axis of sliding shaft. Atip pin is secured to the sliding shaft at an eccentric position so asto be able to cope with the thickness of the band mounted on the bandcradle. Each band connecting pin is pushed by means of the tip pin sothat the band connecting pin is pressed out toward the groove. Thedisclosed device can be applied to varied bands having slightlydifferent band connecting pin positions only by rotating the slidingshaft.

Furthermore, a special purpose tool is needed for opening a case back ofa chamfer structure from a wristwatch case. Wrenches are commonly usedfor opening the watch case back.

However, in the use of conventional band connecting pin removing tool,occasionally, pins cannot be removed without the application of greatforce because of the crush of hole for insertion of a band connectingpin or the dislocation of position of hole between band pieces.Therefore the tip pin would be bent or be broken. Further, human pressforce is limited, so that failure to remove band connecting pins hasbeen experienced when the band connecting pins are rusted or when dustor the like sticks to the holes for insertion of band connecting pins.With respect to the chamfered case back of wristwatch case as well,failure to remove it by wrenching has been experienced when the chamferportion has been deformed or rusted. At all events, large strength andknack have been needed.

SUMMARY OF THE INVENTION

The present invention has been made with a view toward solving the aboveproblems of the prior art. Accordingly, the object of the presentinvention is to provide a tool for wristwatch capable of easily removinga band connecting pin, a case back of wristwatch case or the like, whichcould not be removed with the use of conventional wristwatch tools, withonly application of the same given force as in the prior art.

According to one aspect of the present invention, there is provided awristwatch tool for use in removing a band connecting pin, a case backof a wristwatch case or the like, said tool comprising:

a substantially cylindrical tool main body including, providedthereinside:

a sliding shaft having a front end adapted to permit replaceablesecuring of a wristwatch tool component, said sliding shaft having thefront end protruding from the tool main body; and

hammering means, said hammering means comprising:

a compression spring, and a hammering member adapted to be energized andslide toward the sliding shaft by the compression spring, and

a trigger member capable of releasing spring force of the compressionspring when the compression spring has reached a predeterminedcompression level,

said sliding shaft and said hammering means so arranged thatinstantaneous large force is applied to the wristwatch tool component byhammering the rear end of the sliding shaft by means of the hammeringmeans.

The tool for wristwatch according to the present invention may becharacterized in that the tool main body comprises a head part tubebody, a center tube body threadedly engaged with the head part tubebody, and a tip tube body threadedly engaged with the center tube body,and

wherein inside of the center tube body, a partition part having a holeof small diameter is formed.

Also, the tool for wristwatch according to the present invention may becharacterized in that at the side of the tip tube body of the partitionpart, a slant face, which is extending from the hole of small diameterto an inside wall of the center tube body is formed.

Further, the tool for wristwatch according to the present invention maybe characterized in that the hammering member is disposed on the headpart tube body side of the partition part, the hammering member beingprovided with a center hole; and

wherein the trigger member is disposed on the tip tube body side of thepartition part, the trigger member comprising:

a trigger shaft having a part of small diameter and a part of largediameter, the small diameter part adapted to be inserted in the centerhole of the hammering member, the large diameter part adapted to passthrough the small diameter hole of the partition part, the largediameter part brought into contact with the rear end of the slidingshaft, and

a deformed coil spring capable of energizing the trigger shaft towardthe sliding shaft while slanting the trigger shaft,

the slanted trigger shaft arranged to compress the compression springthrough the hammering member by pressing of the front end of the slidingshaft,

the trigger shaft arranged to stand erect in the moment that the largediameter part of the trigger shaft is fitted in the small diameter hole.

Still further, the tool for wristwatch may be characterized in that thecompression spring is disposed in the center tube body and the head parttube body, the spring force of the compression spring is adjustable byregulating a length of threaded engagement of the center tube body withthe head tube body.

Still further, the tool for wristwatch according to the presentinvention may be characterized in that further comprising pliers havinga one-side functioning part and an other-side functioning part, wherein:

a head part of the tool for wristwatch engages with the inside of theone-side functioning part of the pliers, and

the tool main body or the sliding shaft are arranged so as to passthrough a through hole of the other-side functioning part of the pliers,

the tool for wristwatch further comprising a spring capable ofenergizing the tool main body toward the one-side functioning part and ajig for fixing a wristwatch exterior part arranged outside theother-side functioning part.

Still further, the tool for wristwatch according to the presentinvention may be characterized in that the securing of the wristwatchtool component to the front end of the sliding shaft is accomplished byat least one of insertion of a shaft in a shaft hole under pressure,screwing of a shaft in a shaft hole with setscrew hole, engagement of anexternal thread with an internal thread, interlock of a protrudent partwith a recessed part and interlock of a taper shaft with a bearing.

Still further, the tool for wristwatch according to the presentinvention may be characterized in that at the front end portion of thesliding shaft, an interlock groove for securing the wristwatch toolcomponent is formed,

at the center of the wristwatch tool component, a lock hole is formedand inside of the lock hole, a recessed groove is formed, and an o-ringmember consisting of en elastic member is fitted in the recessed groove,

the O-ring member arranged so as to be fitted in the interlock groove ofthe sliding shaft, thereby enabling detachably securing the wristwatchtool component to the front end portion of the sliding shaft.

Still further, the tool for wristwatch according to the presentinvention may be characterized in that the base end portion of thewristwatch tool component is provided with an abutment member consistingof a flexible member.

Still further, the tool for wristwatch according to the presentinvention may be characterized in that a pin or deformed pin forremoving a band connecting pin as the wristwatch tool component isdetachably secured.

Still further, the tool for wristwatch according to the presentinvention may be characterized in that the pin for removing a bandconnecting pin is constituted of a superelastic metallic materialconsisting of an alloy which contains nickel/titanium (Ni—Ti) ornickel/titanium/cobalt (Ni—Ti—Co) as a principal component.

Still further, the tool for wristwatch according to the presentinvention may be characterized in that the pin for removing a bandconnecting pin is a push pin at its front end provided with a recessedpart of cone shape.

Still further, the tool for wristwatch according to the presentinvention may be characterized in that the pin for removing a bandconnecting pin is a push pin at its front end provided with a recessedpart consisting of a blind hole adapted to have the connecting pinfitted therein.

Still further, the tool for wristwatch according to the presentinvention may be characterized in that a wrench for removing a bezel ora case back as the wristwatch tool component is detachably secured.

Still further the tool for wristwatch according to the present inventionmay be characterized in that the hammering member is disposed on thehead part tube body side of the partition part, the hammering memberbeing provided with a center hole, and wherein the trigger membercomprises:

a trigger shaft being disposed under the partition part of the centertube body, the trigger shaft at its upper end being provided with anabutment surface of slanted cone shape, the trigger shaft being providedwith a vertical through hole,

an upper part of the sliding shaft, the upper part adapted to passthrough the through hole of the trigger shaft and adapted to be fittedin the center hole of the hammering member, and

the hammering member having its upper end portion formed intosubstantially a dome configuration,

the tool for wristwatch is so arranged that the hammering member isenergized downward by the compression spring, whereby the lower end ofthe hammering member is abutted to the abutment surface of slanted coneshape of the upper end of the trigger shaft, resulting that an axialcenter of the hammering member is based,

the tool for wristwatch is so arranged that the upper part of thesliding shaft raises the hammering member by pressing of the front endof the sliding shaft, whereby the compression spring is compressed bythe hammering member having been biased toward the inside wall, and

the upper end portion of substantially dome configuration of the raisedhammering member is guided by the inside wall of the through hole of thecenter, tube body, whereby the axial center of the hammering member ismoved toward the center, with the result that the hammering memberstands erect.

Still further, the tool for wristwatch according to the presentinvention may be characterized in that the hammering member is raised inaccordance with rise of the sliding shaft so that a slant face providedon a large diameter part of the lower end portion of the hammeringmember is guided by the slant face part of the partition part, wherebythe axial center of the hammering member is gradually departed from theinner wall and shifts toward center so that the hammering member isthrust upward.

Still further, the tool for wristwatch according to the presentinvention may be characterized in that a compression coil spring isinterposed between a lower end of the trigger shaft and the slidingshaft,

the tool for wristwatch is so arranged that the trigger shaft isenergized upward by spring force of the compression coil spring, wherebythe abutment surface of slanted cone shape of the upper end of thetrigger shaft is abutted to the large diameter part of the lower endportion of the hammering member,

the tool for wristwatch is so arranged that the sliding shaft isenergized downward by the spring force of the compression coil spring,whereby the front end of the sliding shaft protrudes from the tip tubebody.

According to the present invention, there is provided a tool forwristwatch, employed to remove a connecting pin from a band connectingpin insertion hole of watchband, said tool comprising:

a substantially cylindrical upper tube body having an inside threadedpart provided on an inside wall of lower end portion thereof and havingan outside threaded part provided on an outside wall thereof,

a removing pin detachably and threadedly engaging the inside threadedpart of the upper tube body, and

a substantially cylindrical lower tube body of taper outline beingdetachably fitted to a lower portion of the upper tube body bythreadedly engaging an inside threaded part provided on an innerperiphery of the lower tube body with the outside threaded part of theupper tube body,

the tool for wristwatch is so arranged that a length of protrusion of afront end portion of the removing pin from a through hole of front endof the lower tube body can be adjusted by regulating a condition ofthreaded engagement of the inside threaded part provided on the innerperiphery of upper end portion of the lower tube body with the outsidethreaded part of the upper tube body.

According to the present invention, further, there is provided a toolfor wristwatch, employed to remove a connecting pin in the event that aconnecting pin is not completely drawn off from a band connecting pininsertion hole of the watchband, after the connecting pin is removedfrom the band connecting pin insertion hole by using the tool forwristwatch of the present invention, said tool comprising:

a substantially cylindrical upper tube body having an inside threadedpart provided on an inside wall of lower end portion thereof and havingan outside threaded part provided on an outside wall thereof,

a removing pin being detachably and threadedly engaged with the insidethreaded part of the upper tube body, and

a substantially cylindrical lower tube body of taper outline beingdetachably fitted to a lower portion of the upper tube body bythreadedly engaging an inside threaded part provided on an innerperiphery of the lower tube body with the outside threaded part of theupper tube body,

the tool for wristwatch is so arranged that a length of protrusion of afront end portion of the removing pin from a through hole of front endof the lower tube body can be adjusted by regulating a condition ofthreaded engagement of the inside threaded part provided on the innerperiphery of upper end portion of the lower tube body with the outsidethreaded part of the upper tube body.

The tool for wristwatch according to the present invention may becharacterized that at the front end of the lower tube body, an abutmentmember consisting of a flexible member is disposed.

Also, the tool for wristwatch according to the present invention may becharacterized in that the removing pin is constituted of a super-elasticmetallic material consisting of an alloy which contains nickel/titanium(Ni—Ti) or nickel/titanium/cobalt (Ni—Ti—Co) as a principal component.

According to still a further aspect of the present invention, there isprovided a hold guide member of substantially clip configuration,comprising a pair of clip hold members and a connecting part adapted tocouple the clip hold members at base end portions thereof in curved formto thereby impart elasticity,

the hold guide member so constructed that a watchband can be fixed byinterposing the watchband between the clip hold members.

The hold guide member according to still a further aspect of the presentinvention may be characterized in that the connecting part is providedwith a pin catcher part consisting of a recessed part of through holeconfiguration adapted to hold a connecting pin so as to prevent droppingof the connecting pin.

According to still a further aspect of the present invention, there isprovided a wristwatch tool set of substantially box configuration,comprising:

an underlying box main body,

a cover member openably secured to one side of the box main body, and

an accommodation member fitted in a box part of the box main body,

said accommodation member on its upper surface side provided with:

a recessed part for accommodation for accommodating the tool forwristwatch,

a recessed part for accommodation for accommodating the wristwatch toolcomponent defined, and

a recessed part for accommodation for accommodating the hold guidemember.

The wristwatch tool set according to the present invention may becharacterized in that the accommodation member on its upper surface sideis further provided with a recessed part for accommodation foraccommodating the tool for wristwatch.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded sectional view of a tool for removing a bandconnecting pin, which is a first form of tool for wristwatch accordingto the present invention.

FIG. 2 is a sectional view of the above tool for wristwatch afterassembly.

FIG. 3 is a sectional view explaining an operating condition of theabove tool for wristwatch.

FIG. 4 is a sectional view explaining another operating condition of theabove tool for wristwatch.

FIG. 5 is a sectional view explaining a further operating condition ofthe above tool for wristwatch.

FIG. 6 is a partial sectional side view of a tool for removing a bandconnecting pin, which is a tool for wristwatch according to a secondembodiment of the present invention.

FIG. 7 is a plan view of a tool component for opening a wristwatch caseback or bezel according to a third embodiment of the present invention.

FIG. 8 is a view of a section on the line A—A of FIG. 7.

FIG. 9 is a plan view of a tool for opening a case back or bezel, whichis fixed to a sliding shaft.

FIG. 10 is a front view of a tool for removing a band connecting pin,which is a fourth form of tool for wristwatch according to the presentinvention.

FIG. 11 is an exploded sectional view of the tool for wristwatch shownin FIG. 10.

FIG. 12(A) is a sectional view explaining an operating condition of theabove tool for wristwatch.

FIG. 12(B) is an enlarged fragmentary view of the hammering member ofthe tool of FIG. 12(A).

FIG. 13(A) is a sectional view explaining another operating condition ofthe above tool for wristwatch.

FIG. 13(B) is an enlarged fragmentary view of the hammering member ofthe tool of FIG. 13(A).

FIG. 14(A) is a sectional view explaining a further operating conditionof the above tool for wristwatch.

FIG. 14(B) is an enlarged fragmentary view of the hammering member ofthe tool of FIG. 14(A).

FIG. 15 is a partial enlarged sectional view explaining the manner ofremoving or fitting of a removing pin detachably fitted to the tool forwristwatch shown in FIG. 10.

FIG. 16 is a partial enlarged sectional view of a push pin detachablyfitted to the tool for wristwatch shown in FIG. 10.

FIG. 17 is a partial enlarged sectional view of a push pin detachablyfitted to the tool for wristwatch shown in FIG. 10.

FIG. 18 is a front view of an auxiliary tool for removing a bandconnecting pin, which is a fifth form of tool for wristwatch accordingto the present invention.

FIG. 19 is an exploded sectional view of the tool for wristwatch shownin FIG. 18.

FIG. 20 is a sectional view explaining an operating condition of theabove tool for wristwatch.

FIG. 21 is a sectional view explaining another operating condition ofthe above tool for wristwatch.

FIG. 22 is a top view of a wristwatch tool set for accommodating thetool for wristwatch according to the present invention.

FIG. 23(A) is a perspective view of a hold guide member included in thewristwatch tool set of FIG. 22; and FIG. 23(B) is a top schematic viewshowing one manner of use of the hold guide member.

FIG. 24 is a perspective view showing one manner of operation forremoving a connecting pin from a watchband connecting pin insertion holewith the use of the tool for wristwatch and hold guide member of FIG.22.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments (Examples) of the present invention will be described indetail below with reference to the appended drawings.

The first embodiment of the present invention will now be described withreference to drawings

FIG. 1 is an exploded sectional view of a tool for removing a bandconnecting pin, which is a first form of tool for wristwatch accordingto the present invention. FIG. 2 is a sectional view of the above toolfor wristwatch after assembly. FIGS. 3 to 5 are sectional viewsexplaining operating conditions of the above tool for wristwatch.

The construction of the first form of tool for wristwatch according tothe present invention will now be described. Referring to FIG. 1,numeral 20 generally denotes one form of tool for wristwatch accordingto the present invention.

As shown in FIG. 1, the tool for wristwatch 20 at its upper end portionincludes substantially cylindrical head part tube body 1 having its oneend closed. The inner wall of the head part tube body 1 is provided withinside threaded part 1 a. Moreover, at the lower part of this head parttube body 1, substantially cylindrical center tube body 2 is coupledwith this head part tube body 1 by engaging the outside threaded part 2a, which is provided on an outer periphery of upper end portion of thecenter tube body 2, with the inside threaded part 1 a of the head parttube body 1.

Furthermore, at the lower end portion of the center tube body 2, insidethreaded part 2 b is formed and this inside threaded part 2 b is adaptedto engage outside threaded part 4 a provided on an outer periphery oftip tube body 4 as described later. Further, at the center tube body 2,a through hole 2 c is formed. At the lower portion of this through hole2 c, a partition part 2 e is formed and this partition part 2 e isprovided with small-diameter hole 2 d whose diameter is smaller thanthat of the through hole 2 c. This partition part 2 e is provided withslant face part 2 f extending from the small-diameter hole 2 d of thepartition part 2 e to the inner wall provided with the inside threadedpart 2 b.

Holding tube body 3 is constructed by threadedly engaging the head parttube body 1 and the center tube body 2. The holding tube body 3 ispreferably coated with a resin so as to facilitate holding thereof.

At the lower portion of the holding tube body 3, namely, at the lowerportion of the center tube body 2, substantially cylindrical tip tubebody 4 having tapered outline is secured by engaging the outsidethreaded part 4 a provided on an outer periphery of upper end portion ofthe tip tube body 4 with the inside threaded part 2 b provided at thelower end portion of the center tube body 2.

In addition, at the center of the tip tube body 4, a through hole 4 b isformed and this through hole 4 b is so formed that it is continuous tosmall-diameter hole 4 c formed at the lower end side, namely, tip endside of the tip tube body 4.

Substantially cylindrical tool main body 5 of the tool for wristwatch 20is constructed by threaded interlock of the holding tube body 3, whichconsists of the head part tube body 1 and the center tube body 2, withthe tip tube body 4.

Further, as shown in FIGS. 1 and 2, in the holding tube body 3, namely,in the through hole 2 c of the center tube body 2, a compression spring6 consisting of a compression coil spring and cylindrical hammeringmember 7 are slidably accommodated between the head part tube body 1 andthe partition part 2 e of the center tube body 2 in such a conditionthat the hammering member 7 is energized downward by the spring force ofthe compression spring 6. In this condition, the outside diameter of thehammering member 7 is larger than the inside diameter of the partitionpart 2 e of the center tube body 2, so that the hammering member 7 islocked by the partition part 2 e of the center tube body 2.

This hammering member 7 is substantially in the form of cylinder havinga bottom, and at the center thereof, a center hole 7 a which is anon-through hole is formed. As described later, small-diameter part 8 aprovided at an upper end portion of trigger shaft 8 can be inserted inthe center hole 7 a.

Still further, as shown in FIGS. 1 and 2, between the center tube body 2and the tip tube body 4, namely, inside the through hole 4 b of the tiptube body 4, a trigger member 10, which is constructed by assembling atrigger shaft 8 and a deformed coil spring 9, and a sliding shaft 11 areaccommodated.

That is to say, a small-diameter part 8 a, which can be inserted in thecenter hole 7 a of the hammering member 7 with a sufficient clearance,is formed at the upper end portion of the trigger shaft 8. Thissmall-diameter part 8 a is so formed as to continue to a large-diameterpart 8 c through slant face 8 b. Further, at the lower end side of thelarge-diameter part 8 c, a collar part 8 d is formed. Thislarge-diameter part 8 c is so constructed as to be insertable in thesmall-diameter hole 2 d of the center tube body 2.

On the other hand, with respect to the deformed coil spring 9, as shownin FIGS. 1 and 2, some turns of the spring member coils at lower end 9 athereof have inside diameters which are smaller than the diameter of thelarge-diameter part 8 c of the trigger shaft 8. Moreover, the centeraxis of the deformed coil spring 9 is largely curved (biased) at thelower end 9 a thereof. The deformed (oil spring 9 is inserted into thelarge-diameter part 8 c of the trigger shaft 8 from the lower end 9 a ofthe deformed coil spring 9 so that it is wound around the large-diameterpart 8 c to be incorporated with the collar part 8 d.

At the upper end of the sliding shaft 11 a large-diameter head part 11 ais formed. Further, at the lower end (tip) portion of the sliding shaft11, a small-diameter engagement part 11 b, to which wristwatch toolcomponents can be replaceably fixed, is formed.

The trigger member 10, which is constructed by assembling the triggershaft 8 and the deformed coil spring 9, and the sliding shaft 11 areaccommodated in the inside wall of the tip tube body 4, namely, in thethrough hole 4 b of the tip tube body 4 in such a condition that asufficient clearance is provided therebetween.

That is to say, the sliding shaft 11 is mounted in such a condition thatthe small-diameter engagement part 11 b thereof passes through thesmall-diameter hole 4 c of the tip tube body 4 and protrudes therefromin a loosely-fitting fashion. However, the head part 11 a of the slidingshaft 11 has a diameter larger than that of the small-diameter hole 4 cof the tip tube body 4 so that the sliding shaft 11 may not fall outfrom the small-diameter hole 4 c of the tip tube body 4.

In this condition, the trigger member 10 is disposed in the spacebetween the head part 11 a of the sliding shaft 11 and the partitionpart 2 e of the center tube body 2 and is arranged in such a conditionthat the lower end of the trigger shaft 8 of the trigger member 10 abutsto the head part 11 a of the sliding shaft 11 and the upper end of thedeformed coil spring 9 abuts to the partition part 2 e of the centertube body 2.

As a result, as shown in FIG. 2, the trigger shaft 8 is energized towardthe sliding shaft 11 in a manner such that the small-diameter part 8 aof the upper end portion of the trigger shaft 8 shifts toward the insidewall of the tool main body 5, namely, the trigger shaft 8 slants byvirtue of the spring force of the deformed coil spring 9 and by virtueof the marked curving (biasing) at lower end 9 a of the center axis ofthe deformed coil spring 9.

Moreover, a removing pin 12, which is a tool for removing a bandconnecting pin, is fixed to the engagement part 11 b of the slidingshaft 11 by inserting the engagement part 11 b into a lock hole 12 aunder pressure. The removing pin 12 has a straight pin part 12 c whichcan be inserted in a band connecting pin insertion hole of watchband.

In this case, the material for the straight part 12 c of this removingpin 12 is not particularly limited, and as for this material, commontool steels such as carbon tool steels (SK2M, SK3M, SK4M, SK5M and SK6Mdefined in Japanese Industrial Standard (JIS)) and alloy tool steels(SKS2M, SKS5M, SKS51M and SKS7M defined in Japanese Industrial Standard(JIS)) having been subjected to heat treatment can be used. In addition,the straight part 12 c is preferably such that it can be easily restoredto the original form without suffering bending or breakage in theoperation for removing or adjusting a band connecting pin of watchband.Therefore, it is preferred that the material for the straight part 12 cof the removing pin 12 consist of a super-elastic material. Such asuper-elastic material is preferably a super-elastic metallic materialconsisting of an alloy which contains nickel/titanium (Ni—Ti) ornickel/titanium/cobalt (Ni—Ti—Co) as a principal component.

For example, the material for the straight part 12 c can be at least onealloy selected from the group consisting of Ni—Ti, Ni—Ti—Cu, Ni—Ti—Fe,Ni—Ti—Nb, Ni—Ti—Zr, Ni—Ti—Hf, Cu—Zn, Cu—Zn—Al, Cu—Zn—Si, Cu—Au—Zn,Cu—Al, Cu—Al—Ni, Fe—Ni—Al, Fe—Ni—Al—Ti, Fe—Ni—Co—Ti, Fe—Mn—Si, Ag—Cd,Au—Cd, Cu—Sn, Cu—Au—Zn, Cu—Zn—Be, Cu—Zn, Ni—Al and Fe—Mn—Si—Cr—Ni.

More specifically, as the material for the straight part 12 c, forexample, Ni—Ti composed of 50% by weight of Ni and 50% by weight of Ti,or Ni—Ti composed of 40% by weight of Ni and 60% by weight of Ti can beused. In particular, these super-elastic metallic materials are suitablefor use in removing pin 12 whose straight part 12 c is long.

Now, the operation of the thus constructed wristwatch tool 20 accordingto the first embodiment will be described with reference to FIGS. 2 to5.

Firstly, the center position of the wristwatch tool 20 in the state ofFIG. 2 is aligned with the axial center of a wristwatch band connectingpin, not shown, by holding the head part tube body 1 thereof by hand.

Then, as shown in FIG. 3, the tool for wristwatch 20 is pressed in thearrow direction. Consequently, the sliding shaft 11 rises, resistingagainst the spring force of the deformed coil spring 9. Thus,the headpart 11 a of the sliding shaft 11 thrusts the trigger member 10 upward.However, the deformed coil spring 9 is stopped and compressed by thepartition part 2 e.

On the other hand, the upper end of the small-diameter part 8 a of thetrigger shaft 8, while keeping contact with the slant face 2 f of thecenter tube body 2, passes through the small-diameter hole 2 d andthrusts the hammering member 7 upward. As a result, the compressionspring 6 is compressed by the hammering member 7 so that the hammeringmember 7 is pushed back with large force by the compression spring 6.

When the tool main body 5 of the tool for wristwatch 20 is furtherpressed in the arrow direction, the slant face part 8 b of the triggershaft 8 is finally engaged with the slant face 2 f of the center tubebody 2.

When the tool main body 5 is still further pressed, the slant face 8 bof the trigger shaft 8 is guided by the slant face 2 f of the partitionpart 2 e by the interaction between the slant face 8 b of the triggershaft 8 and the slant face 2 f of the partition part 2 e. As a result,the trigger shaft 8 stands erect so that the small-diameter part 8 a isshifted to the center of the center tube body 2 (see FIG. 3).

When the upper end of the small-diameter part 8 a of the trigger shaft 8slides on the lower end surface of the hammering member 7 and thesliding shaft 11 is slid in a predetermined stroke, the compressionspring 6 reaches a predetermined compression level. As a result, asshown in FIG. 4, the axial center of the trigger shaft 8 issubstantially aligned with the axial center of the tool main body 5. Atthis stage, the trigger actuation of the trigger member 10 is initiated.

That is, at this stage, the small-diameter part 8 a and the center hole7 a of the hammering member 7 align with each other simultaneously withthe initiation of fitting of the large-diameter part 8 c into thesmall-diameter hole 2 d. At that moment, the spring force of thecompression spring 6 is suddenly released, so that the small-diameterpart 8 a of the trigger shaft 8 is instantaneously fitted in the centerhole 7 a of the strongly pressed hammering member 7. Thus, as shown inFIG. 5, strong impact (hammering force) is exerted on the sliding shaft11 which is in contact with the trigger shaft 8. In this connection, thelength of the small-diameter part 8 a of the trigger shaft 8 is so setup that the hammering member 7 may not contact with the partition part 2e when the small-diameter part 8 a is fitted in the hammering member 7.

In this arrangement, the spring force of the compression spring 6disposed in the center tube body 2 and the head part tube body 1 can beadjusted by regulating the length of threaded engagement of the centertube body 2 with the head part tube body 1. Consequently, the magnitudeof the above impact can be regulated.

Thereafter, when the pressed tool main body 5 is drawn in the reversedirection; the hammering member 7 is returned until the hammering member7 is abutted to the partition part 2 e by the force of the compressionspring 6. Further, with respect to the trigger member 10, the triggershaft 8 is pushed back by the force of the deformed coil spring 9, sothat the sliding shaft 11 is also pushed back.

Accordingly, the trigger shaft 8 is drawn off the center hole 7 a and isbiased once more. As a result, the tool for wristwatch 20 returns to theoriginal arrangement as shown in FIG. 2.

In the above first embodiment, the coil spring has been used as thecompression spring 6. However, as for the compression spring 6, a leafspring, a corrugated spring or the like can be also used.

Also, the tool component for removing a band connecting pin is notlimited to that shown in FIG. 1. For example, a deformed pin of, forexample, elliptic section can be used. The tool component can bereplaced by any one of unlimited configuration and usage. The engagementof the tool component with the sliding shaft is not limited to theinsertion of the straight shaft in the shaft hole under pressure, andmay be accomplished by at least one of fixing of a shaft in a shaft holeby means of a setscrew, engagement of an external thread with aninternal thread, interlock of a protrudent part with a recessed part andinterlock of a taper shaft with a bearing. Further, if a tool componentwhose diameter is smaller than that of the small-diameter hole 4 c ofthe tip tube body 4 can be formed, the tool component may be formeduniformly and with the sliding shaft.

The thus constructed tool for wristwatch 20 according to the firstembodiment has the following functions and effects.

That is to say, in the tool main body 5 of the wristwatch tool 20, thehammering mechanism consisting of the compression spring 6, thehammering member 7 and the trigger member 10 is provided. Therefore,strong force that cannot be obtained by conventional static pushing canbe applied to the tip of the tool for wristwatch 20 which is fitted withthe tool component for removing a band connecting pin. As a result, pinscan be removed easily, even if it is rusted.

Further, the predetermined compression level of the compression spring 6can be regulated by changing the length of threaded engagement of thecenter tube body 2 with the head part tube body 1. Therefore, themagnitude of impact on the tool component for wristwatch can be easilyregulated while constantly performing the triggering operation of thetrigger member 10 at given stroke of the sliding shaft 11.

Moreover, the trigger shaft 8 is energized to be biased by the deformedcoil spring 9, so that, at the initial stage of operation, the hammeringmember 7 can be thrust upward by the biased trigger shaft 8. After givenstroke of the sliding shaft 11, the trigger shaft 8 stands erect by theinteraction between the slant face 2 f of the partition part 2 e of thecenter tube body 2 and the trigger shaft 8. This functions as a trigger,and the compression spring 6 is released instantly so that the hammeringmember 7 can be pushed out.

At that time, force of about 15 to 25 times that at the static pushingis instantaneously applied to the tip of the tool for wristwatch 20.

Nextly, the second embodiment of the present invention will be describedwith reference to drawings.

FIG. 6 is a partial sectional side view of a tool for removing a bandconnecting pin, which is a tool for wristwatch according to the secondembodiment of the present invention.

In FIG. 6, numeral 30 denotes pliers. Numeral 21 denotes a one-sidefunctioning part of the pliers, and numeral 22 denotes an other-sidefunctioning part of the pliers. Numeral 23 denotes a fulcrum of both ofthe functioning parts 21, 22. The front end portion of the one-sidefunctioning part 21 is bent at substantially a right angle so that ahook part 21 a is formed. Perpendicular line from the fulcrum 23 crosseson the extension line L of the inside outline of the hook part 21 a.

Numeral 24 denotes a wristwatch band receiving member as an exteriorpart fixing jig, which is secured to an outside portion of front end ofthe other-side functioning part 22. The band receiving member 24 isprovided with a through hole 25 a which is adapted to pass the belowdescribed main body or sliding shaft of wristwatch tool therethrough.Further, the band receiving member 24 is provided with clearance groove24 a for a removed band connecting pin, which is disposed in aneighboring opposite receiving surface on the center axis of the throughhole 25 a.

Numeral 20 denotes a tool for wristwatch of the same construction as inthe first embodiment. The tool main body has a substantially cylindricalshape and is not coated with a resin. Numeral 25 denotes a bearingbonded to the front end of the other-side functioning part 22. At thebearing 25, a through hole 25 a, which is adapted to pass the tool ofwristwatch 20 or sliding shaft 11 therethrough, is formed.

The front end of the sliding shaft 11 is replaceably fitted withremoving pin 13, which is a tool component for removing a bandconnecting pin. Numeral 26 denotes a head part secured to the rear endof the tool for wristwatch 20 or formed as a unified part of tool mainbody. The head part 26 is engaged with the inside surface 21 b of theone-side functioning part 21. Numeral 27 denotes a return springconsisting of a compression coil spring, which is inserted in the toolfor wristwatch 20 between the head part 26 of the tool for wristwatch 20and the bearing 25. The return spring 27 energizes the head part 26toward the one-side functioning part 21.

The upper limit of the open angle of the pliers 30 is regulated by thehook part 21 a. The return spring 27 is not limited to the above coilspring, and the position at which the return spring 27 is disposed isnot limited as long as it lies between the both of the functioningparts.

Nextly, the operation of the above tool for removing a band connectingpin will be described.

A wristwatch band, not shown, is disposed on the band receiving member24, and the axial center of the tool for wristwatch 20 and the axialcenter of a band connecting pin; are positioned so as to align with eachother. Thereafter, the handles of the pliers 30 are grasped so that thefront ends of the pliers 30 are closed.

The front end inside surface 21 b of the one-side functioning part 21pushes the surface of the head part 26 while sliding thereon.Consequently, the tool 26 for removing a band connecting pin is pusheddownward, thereby pushing the band connecting pin.

When grasping of the handles of the pliers 30 is continued, thehammering means is actuated upon passage of predetermined stroke in themanner as described with respect to the operation of the firstembodiment, so that strong impact is applied to the band connecting pin.

The thus constructed tool for wristwatch according to the secondembodiment exerts the following functions and effects.

The tool for wristwatch 20 can be secured by means of the pliers 30, andthe band can be secured by means of the band receiving member 24. Theoperation for removing a band connecting pin can be performed by onehand and thus the operation can be further facilitated.

The band connecting pin is pushed by large impact strength, so thatpins, even if rusted, can be easily pushed out from the band by graspingthe pliers 30 with common force.

In addition, the above second embodiment will be applicable to, forexample, the operation for removing a case back or a bezel by changingwristwatch tool components and jigs for fixing wristwatch exterior parts(band receiving member).

Nextly, the third embodiment of the present invention will be describedwith reference to drawings.

FIG. 7 is a plan view of a tool component for opening a wristwatch caseback or bezel according to the third embodiment of the presentinvention. FIG. 8 is a view of a section on the line A—A of FIG. 7. FIG.9 is a plan view of a tool for opening a case back or bezel, which isfixed to the sliding shaft.

In FIGS. 7 and 8, numeral 31 denotes a wrench which is a tool componentfor opening a wristwatch case back or bezel. This wrench is secured tothe sliding shaft 11 at the front end of the tool for wristwatch asdescribed in the first embodiment, and provides means for opening a caseback or bezel.

Edge part 31 a of acute angle section is provided at the front end ofthe wrench 31. Further, a nonthrough shaft hole 31 c, which is theengagement section with the sliding shaft 11, is formed in the center ofthe rear end surface of the wrench 31. Moreover, a threaded hole 31 bfor setscrew, for fixing the wrench 31 to the engagement part 11 b ofthe sliding shaft 11 extends from the upper surface of the wrench 31 tothe shaft hole 31 c. Numeral 32 denotes a setscrew adapted to engage thethreaded hole 31 b for setscrew.

As shown in FIG. 9, after inserting the sliding shaft 11 in the tip tubebody 4, the wrench 31 is fixed to the engagement part 11 b of thesliding shaft 11 by means of the setscrew 32.

The thus constructed tool for wristwatch according to the thirdembodiment exerts the following functions and effects.

The wrench 31 is fixed to the sliding shaft 11 of the same tool frowristwatch has in the first embodiment. Therefore, when a case back ofchamfer structure is disassembled from a wristwatch or a bezel isdisassembled from a wristwatch case, the edge part 31 a is engaged witha wrenching point and the main body of tool for wristwatch is pressed.As a result, even if it is the case back or bezel which were rusted andsecured firmly and it is pressed by the same force as usual, largeimpulse can be exerted to the wrench 31. Therefore, even if the caseback is rusted, it can be opened easily.

This tool for wristwatch can also be applied to, for example, thedisassembly of register rings in the same manner.

Nextly, the fourth embodiment of the present invention will be describedwith reference to drawings.

FIG. 10 is a front view of a tool for removing a band connecting pin,which is a fourth form of tool for wristwatch according to the presentinvention. FIG. 11 is an exploded sectional view of the tool forwristwatch shown in FIG. 10. FIGS. 12 to 14 are sectional viewsexplaining operating conditions of the above tool for wristwatch. FIG.15 is a partial enlarged sectional view explaining the manner ofremoving or fitting of a removing pin detachably fitted to the tool forwristwatch shown in FIG. 10.

In FIGS. 10 and 11, numeral 40 generally denotes the fourth form of toolfor wristwatch according to the present invention.

As shown in FIGS. 10 and 11, at the upper end of the tool for wristwatch40, substantially cylindrical head part tube body 41, of which one endis closed, is provided. The inner wall of the head part tube body 41 isprovided with inside threaded part 41 a. At the lower part of the headpart tube body 41, substantially cylindrical center tube body 42 isfitted by engaging an outside threaded part 42 a provided on an outerperiphery of upper end portion of the center tube body 42 with theinside threaded part 41 a of the head part tube body 41.

At the lower end portion of the center tube body 42, an inside threadedpart 42 b, which is adapted to engage outside threaded part 44 aprovided on an outer periphery of a tip tube body 44 as described lateris formed. Further, at the center of the center tube body 42 a throughhole 42 c is formed. At the lower portion of this through hole 42 c, apartition part 42 e having a small-diameter hole 42 d whose diameter issmaller than that of the through hole 42 c is provided. This partitionpart 42 e is provided with slant face part 42 f, which is extending fromthe small-diameter hole 42 d of the partition part 42 e to the innerwall 42 g provided with the inside threaded part 42 b.

Holding tube body 43 is constructed by threadedly engaging the head parttube body 41 with the center tube body 42.

At the lower end portion of the center tube body 42, a holding taperpart 42 h having its diameter decreased so as to facilitate holding atthe time of holding by hand.

At the lower portion of the holding tube body 43, namely, at the lowerportion of the center tube body 42, is coupled with substantiallycylindrical tip tube body 44 having taper outline is secured by engagingoutside threaded part 44 a provided on the outer periphery ofsmall-diameter part 44 d at an upper end portion of the tip tube body 44with the inside threaded part 42 b provided at the lower end portion ofthe center tube body 42.

At the center of the tip tube body 44, a through hole 44 b is formed.The through hole 44 b is so formed that it is continuous tosmall-diameter hole 44 c formed at the lower end side, namely, tip endside of the tip tube body 44.

Substantially cylindrical tool main body 45 of the tool for wristwatch40 is constructed by threadedly engaging the holding tube body 43, whichconsists of the head part tube body 41 and the center tube body 42, withthe tip-tube body 44.

Further, as shown in FIGS. 10 and 12(A)–12(B), a compression spring 46consisting of a compression coil spring and a substantially cylindricalhammering member 47 are slidably accommodated inside the holding tubebody 43, namely, inside the through hole 42 c of the center tube body42, in such a condition that the hammering member 47 is energizeddownward by the spring force of the compression spring 46.

This hammering member 47 is substantially in the form of a bottomedcylinder, and, at its center, has a center hole 47 a which is anonthrough hole. As described later, small-diameter part 51 a of anupper portion of sliding shaft 51 can be inserted in the center hole 47a.

At the lower end of the hammering member 47, a large-diameter part 47 bis formed, and at the upper end of the hammering member 47, an upper endpart 47 c having substantially the shape of a dome is formed. Thehammering member 47 has a tapered surface 47 d whose diameter isgradually decreased from the upper end part 47 c toward thelarge-diameter part 47 b. The hammering member 47 is so formed that itis continuous from the lower end of the tapered surface 47 d throughslant face 47 e to the large-diameter part 4 b.

Trigger shaft 48 is disposed between-the center tube body 42 and the tiptube body 44, namely, inside of the inner wall 42 g of the through hole42 c under the partition part 42 e of the center tube body 42.

This trigger shaft 48 is substantially cylindrical, and at the upper endportion thereof, abutment surface 48 a having the shape of a slant coneis formed. Further, at the center portion of the trigger shaft 48, avertical through hole 48 b is formed. As described later, small-diameterpart 51 a of an upper portion of sliding shaft 51 can pass through thethrough hole 48 b.

Moreover, under the trigger shaft 48, sliding shaft 51 is disposed. Atthe upper portion of the sliding shaft 51, small-diameter part 51 a isformed. In addition, at the lower portion (front end portion) of thesliding shaft 51, large-diameter engagement part 51 b, to whichwristwatch tool components can be replaceably fixed is provided. Lockpart 51 c whose diameter is larger than that of the engagement part 51 bis provided in the middle of the sliding shaft 51.

Furthermore, a compression coil spring 49 is interposed between thelower end 48 c of the trigger shaft 48 and the lock part 51 c of thesliding shaft 51. The tool for wristwatch is so constructed that thetrigger shaft 48 is energized upward by the spring force of thecompression coil spring 49. As a result abutment surface 48 a having aslant cone shape, which is provided at the upper end of the triggershaft 48, abuts the large-diameter part 47 b provided at the lower partof the hammering member 47.

As a result, as shown in FIGS. 12(A)–12(B), the hammering member 47 isenergized downward by the spring force of the compression spring 46, sothat one end portion 47 f of the large-diameter part 47 b of the lowerend of the hammering member 47 is guided by the abutment surface 48 ahaving the shape of a slant cone, which is provided at the upper end ofthe trigger shaft 48, and one end 47 g of the slant face 47 e of thehammering member 47 is guided by the slant face part 42 f of thepartition part 42 e. Therefore, the axial center of the hammering member47 is biased toward the inner wall 42 g.

Furthermore, the sliding shaft 51 is so mounted that the sliding shaft51 is energized downward by the spring force of the compression coilspring 49 to thereby cause the engagement part 51 b of the sliding shaft51 to pass through the small-diameter hole 44 c of the tip tube body 44and protrude loosely therefrom. However, since the lock part 51 c of thesliding shaft 51 has a diameter larger than that of the small-diameterhole 44 c of the tip tube body 44, the sliding shaft 51 may not fall outfrom the small-diameter hole 44 c of the tip tube body 44.

In this construction, the spring force of the compression spring 46which energizes the hammering member 47 downward is set for beinggreater than the spring force of the compression coil spring 49 whichenergizes the trigger shaft 48 upward. Consequently, as shown in FIGS.12(A)–12(B), when the tool for wristwatch is not in use, the lower end48 c of the trigger shaft 48 is held abutting the small-diameter part 44d of the upper end portion of the tip tube body 44.

In this state, as shown in FIGS. 12(A)–12(B), the length of thesmall-diameter part 51 a of the upper portion of the sliding shaft 51 isso determined that upper end 51 d of the small-diameter part 51 a of theupper portion of the sliding shaft 51 slightly protrudes from thethrough hole 48 b.

Furthermore, as shown in FIG. 15, the engagement part 51 b of thesliding shaft 51 is provided with engaging groove 51 e for removing pin.

On the other hand, as shown in FIG. 15, at the center of the removingpin 52, which is a tool component for removing a band connecting pin, alock hole 52 a is formed. The removing pin 52 further includes straightpin part 52 c which can be inserted in a band connecting pin insertionhole of watchband. In the interior of the lock hole 52 a, recessedgroove 52 d is formed. Inside of this recessed groove 52 d, O-ringmember 52 f consisting of an elastic member such as a rubber, asynthetic resin or the like is disposed.

At the base end of the straight pin part 52 c, there is providedabutment member 52 g consisting of a flexible member such as a siliconerubber, a urethane rubber or the like. Accordingly, where a bandconnecting pin of watchband is removed from the watchband by using thetool for wristwatch 40, even if the removing pin 52 collides with thevicinity of a band connecting pin insertion hole of watchband by impactforce, the impact force by the abutment member 52 g would be reduced. Asa result, marring and damaging of the vicinity of the band connectingpin insertion hole of watchband can be effectively prevented.

The removing pin 52 of the above structure, as shown in FIG. 15, is soconstructed that, the engagement part 51 b of the sliding shaft 51 isinserted in the lock hole 52 a of the removing pin 52. As a result, theO-ring member 52 f, which is disposed in the recessed groove 52 d of thelock hole 52 a, is fitted in the engaging groove 51 e of the engagementpart 51 b of the sliding shaft 51. Consequently, removing pin 52 can bedetachably fitted to the engagement part 51 b of the sliding shaft 51.

As shown in FIG. 16, push pin 52′ may be used in place of the aboveremoving pin 52 so that when the connecting pin having been removed froma band connecting pin insertion hole of watchband is inserted again in aband connecting pin insertion hole, the tool for wristwatch 42 may beused.

Accordingly, as shown in FIG. 16, the push pin 52′ is devoid of a partcorresponding to the straight pin part 52 c of removing pin 52 shown inFIG. 15. Instead, at the center of the abutment member 52 g, a recessedpart 52 h of cone shape to which a connecting pin is contacted isformed. When connecting pin is pushed, the escape of connecting pin canbe prevented by this recessed part 52 h of cone shape.

Moreover, as shown in FIG. 17, the push pin 52′ is devoid of a partcorresponding to the straight pin part 52 c of removing pin 52 shown inFIG. 15. Instead, at the center of the abutment member 52 g, a recessedpart 52 h consisting of a blind hole for insertion of a connecting pinmay be provided. When a connecting pin is pushed, the escape ofconnecting pin can be more effectively prevented by this recessed part52 h consisting of a blind hole. The recessed part 52 h of the push pin52′ is especially suitable for fitting, for example, a bridge pin, a pinor a C ring.

The other components are identical with those of the removing pin 52, sothat like reference numbers have been assigned to like componentmembers.

The present invention is so constructed that the tool of wristwatch 40is operated, as described later, by using the above push pin 52′ in thestate that a connecting pin is connected or fitted in the recessed part52. As a result, the connecting pin can be inserted in a band connectingpin insertion hole of watchband by the induced impact force.

Nextly, the operation of the thus constructed tool for wristwatch 40will be described with reference to FIGS. 12 to 14.

First, the head part tube body 41 is held by hand so that the centerposition of the tool for wristwatch 40 of FIGS. 12(A)–12(B) is alignedwith the axial center of a wristwatch band connecting pin (not shown).

Then, as shown in FIGS. 13(A)–13(B), the tool for wristwatch 40 ispressed in the arrow direction. Consequently, the sliding shaft 51rises, resisting the spring force of the compression coil spring 49.

In accordance with the rise of the sliding shaft 51, the upper end 51 dof the small-diameter part 51 a of the upper portion of the slidingshaft 51 passes through the through hole 48 b of the trigger shaft 48and protrudes therefrom. Thus, the upper end 51 d abuts the one endportion 47 f of the large-diameter part 47 b of the lower end of thehammering member 47.

In this state, the axial center of the hammering member 47 is biasedtoward the inner wall 42 g as aforementioned, so that the upper end 51 dof the small-diameter part 51 a of the sliding shaft 51 is not fitted inthe center hole 47 a of the hammering member 47. Therefore, while theupper end 51 d of the small-diameter part 51 a of the sliding shaft 51abuts the large-diameter part 47 b of the lower end of the hammeringmember 47, the hammering member 47 is raised, resisting the compressionspring 46.

At this stage, the compression spring 46 and the compression coil spring49 are compressed, respectively.

Further, in this state, the trigger shaft 48 is energized upward by thespring force of the compression coil spring 49. As a result, theuppermost portion of the conical abutment surface 48 a of the upper endof the trigger shaft 48 abuts the slant face part 42 f of the partitionpart 42 e so that the trigger shaft 48 can not be moved upward any more.

On the other hand, in accordance with the rise of the sliding shaft 51,the hammering member 47 is further raised, so that the one end 47 g ofthe slant face 47 e of the hammering member 47 is guided by the slantface part 42 f of the partition part 42 e. As a result, the hammeringmember 47 is gradually departed from the inner wall 42 g to move towardthe center, so that the hammering member 47 is thrust upward.Accordingly, the compression spring 46 is compressed by the hammeringmember 47 so that the hammering member 47 is pushed back with largeforce.

When the tool main body 45 of the tool for wristwatch 40 is pressedfurther, in the arrow direction, the upper end 51 d of thesmall-diameter part 51 a of the sliding shaft 51 is protruded from thethrough hole 48 b of the trigger shaft 48, so that the hammering member47 is pushed upward. Accordingly, the upper end part 47 c of hammeringmember 47 having substantially the shape of a dome is guided along theinner wall of the through hole 42 c of the center tube body 42. As aresult, the axial center of the hammering member 47 is further moveduntil standing erect so that the axial center of the hammering member 47is shifted to the center of the center tube body 42 (see FIG. 13).

When the sliding shaft 51 is slid in predetermined stroke, thecompression spring 46 reaches a preset compression level. As a result,as shown in FIG. 14, the axial center of the hammering member 47 issubstantially aligned with the axial center of the tool main body 45. Atthis stage, the trigger operation is initiated.

That is, at this stage, the small-diameter part 51 a of the slidingshaft 51 and the center hole 47 a of the hammering member 47 align witheach other. At that moment, the spring force of the compression spring46 is suddenly released, so that the small-diameter part 51 a of thesliding shaft 51 is instantaneously fitted in the center hole 47 a ofthe strongly pressed hammering member 47. As a result, as shown in FIG.15, strong impact (hammering force) is exerted on the sliding shaft 51.

In this arrangement, the spring force of the compression spring 46,which is disposed in the center tube body 42 and the head part tube body41 can be regulated by changing the length of threaded engagement of thecenter tube body 42 with the head part tube body 41. Consequently, themagnitude of the above impact can be regulated.

Thereafter, when the pushed tool main body 45 is drawn in the reversedirection, one end portion 47 f of the large-diameter part 47 b of thelower end of the hammering member 47 is guided by the abutment surface48 a having slant cone shape of the upper end of the trigger shaft 48,by the spring force of the compression spring 46. Further, one end 47 gof the slant face 47 e of the hammering member 47 is also guided by theslant face part 42 f of the partition part 42 e. Therefore, the axialcenter of the hammering member 47 is biased toward the inner wall 42 g.Thus, the hammering member 47 is returned to the original position ofFIG. 12.

Further, at this stage, the sliding shaft 51 is energized downward bythe spring force of the compression coil spring 49, so that the slidingshaft 51 is pushed back to return to the original position of FIGS.12(A)–12(B).

In the above fourth embodiment, as in the first embodiment as shown inFIG. 1, the coil spring has been used as the compression spring 6.However, as for the compression spring 6, a leaf spring, a corrugatedspring or the like can be also used.

Also, the removing pin 52 as a tool component for removing a bandconnecting pin is not limited to that shown in FIG. 15. For example,deformed pin of, for example, elliptic section can be used. The toolcomponent can be replaced by any one of unlimited configuration andusage. The engagement of the tool component with the sliding shaft isnot limited to the insertion of straight shaft in shaft hole underpressure, and may be accomplished by at least one of fixing of a shaftin a shaft hole by means of a setscrew, engagement of an external threadwith an internal thread, engagement of a protrudent part with a recessedpart and engagement of a taper shaft with a bearing. Further, if a toolcomponent can be formed in a diameter which is smaller than that of thesmall-diameter hole 44 c of the tip tube body 44, the tool component andthe sliding shaft 41 may be formed into unified body.

With respect to-the material of the straight pin part 52 c of theremoving pin 52, the straight pin part 52 c can be constituted of thesame material as employed in the first embodiment shown in FIGS. 1 to 5,so that the straight pin part 52 c can be easily restored to theoriginal form without suffering bending or breakage in the operation forremoving or inserting a band connecting pin of watchband or adjustingthe same.

In addition, the above tool for wristwatch 40 according to the fourthembodiment can also be used in a manner, not shown, wherein it issecured by means of the pliers 30 as shown in FIG. 6. Further, the toolfor wristwatch 40 can be used in combination with the wrench 31 as atool component for opening a bezel as shown in FIGS. 7 to 9 in place ofthe removing pin 52.

The thus constructed tool for wristwatch 40 according to the fourthembodiment exerts the following functions and effects.

Namely, in the interior of the tool main body 45 of the tool forwristwatch 40, the hammering means including the compression spring 46,the hammering member 47, the trigger shaft 48, the compression coilspring 49 and the sliding shaft 51 are provided. Therefore, large forcethat cannot be obtained by the conventional static pushing can beapplied to the extreme tip of the tool for wristwatch 40 which is fittedwith the tool component for removing a band connecting pin. As a result,pins, even if rusted, can be easily removed.

Further, the preset compression level of the compression spring 46 canbe regulated by changing the length of threaded engagement of the centertube body 1 42 with the head part tube body 41. Therefore, whileconstantly performing the triggering operation of the trigger member 40is performed constantly at certain stroke of the sliding shaft 41, themagnitude of impact on the tool component for wristwatch can be easilyregulated.

Moreover, the trigger shaft 48 is energized so as to be slanted by thedeformed coil spring 49. As a result, at the initial stage of operation,the slanted hammering member 47 can be pushed upward by the slidingshaft 51.

By virtue of the interaction between the slant face 47 e of thehammering member 47 and the slant face part 42 f of the partition part42 e and by virtue of the interaction between the upper end part 47 c ofhammering member 47 having substantially the shape of a dome and theinner wall of the through hole 42 c of the center tube body 42, afterpredetermined stroke of the sliding shaft 51, the hammering member 47stands erect. This becomes a trigger, and the small-diameter part 51 aof the sliding shaft 51 is instantaneously fitted in the center hole 47a of the hammering member 47. Consequently, the compression spring 46 issuddenly released so that the hammering member 47 can be pushed out.

At that time, force of about 15 to 25 times that at the static pushingis instantaneously applied to the extreme tip of the tool for wristwatch40.

Next, the fifth embodiment of the present invention will be described.

FIG. 18 is a front view of a tool for removing a band connecting pin,which is a fifth form of tool for wristwatch according to the presentinvention. FIG. 19 is an exploded sectional view of the tool forwristwatch shown in FIG. 18. FIGS. 20 and 21 are sectional viewsexplaining operating conditions of the above tool for wristwatch.

In FIGS. 18 and 19, numeral 60 generally denotes the fifth form of toolfor wristwatch according to the present invention.

As shown in FIGS. 18 and 19, at the upper end portion of the tool forwristwatch 60, substantially cylindrical upper tube body 61 whose oneend is closed is provided. At the inner wall of the lower end portion ofthe upper tube body, an inside threaded part 61 a is formed. Further, atthe outer wall of the upper tube body 61, an outside threaded part 61 bis formed.

At the lower part of the upper tube body 61, substantially cylindricallower tube body 62 having a tapered outline is detachably fitted bythreadedly engaging inside threaded part 62 a provided on an innerperiphery of the upper end portion of the lower tube body 62 with theoutside threaded part 61 b of the upper tube body 61.

Further, at the center of the lower tube body 62, a through hole 62 b isformed. In the vicinity of the lower end of this through hole 62 b, aflange part 62 c is protruded. This flange part 62 c forms recessed part62 d for abutment member at the lower end of the through hole 62 b.

The thus formed recessed part 62 d for abutment member is fitted withabutment member 64 consisting of a flexible member such as, a siliconerubber, a urethane rubber or the like.

Accordingly, where a band connecting pin of watchband is removed from aband connecting pin insertion hole of watchband by using the tool forwristwatch 60, even if the tip of the lower tube body 62 of the tool forwristwatch 60 collides with the vicinity of a band connecting pininsertion hole of watchband by impact force, the impact force would bereduced by the abutment member 64. As a result, marring and damaging ofthe vicinity of the band connecting pin insertion hole of watchband canbe effectively prevented.

Moreover, upper-end threaded part 66 a of removing pin 66 is detachablyengaged with the inside threaded part 61 a of the upper tube body 61.The tool for wristwatch is so constructed that the relative positionbetween the inside threaded part 62 a provided on an inner periphery ofthe upper end portion of the lower tube body 62 and the outside threadedpart 61 b of the upper tube body 61 can be adjusted. As a result, asshown in FIGS. 20 and 21, straight pin part 66 b of the front endportion of the removing pin 66 can be protruded from through hole 64 awhich is formed at the center of the abutment member 64 of the lowertube body 62. Furthermore the length of the protrusion thereof can beregulated, or the protrusion thereof can be avoided by changing thethreaded engagement state.

Moreover, the length of protrusion of straight pin part 66 b that can beregulated by one turn can be increased, and the speed of regulation canbe doubled or trebled, by using a double thread or a triple thread forthese threaded parts.

For the ease of carriage, the upper tube body 61 is fitted with clipmember 61 c of the same structure as that of a fountain pen clip wherebythe tool for wristwatch can be held on a pocket or the like.

Further, although not shown, it is preferred that the outer surfaces ofthe above upper tube body 61 and lower tube body 62 should be providedwith minute unevenness for non-slip from the viewpoint of easiness inoperating the tool for wristwatch by holding the same by hand.

With respect to the material of the straight pin part 66 b constitutingthe front end portion of the removing pin 66, the straight pin-part 66 bcan be constituted of the same material as employed in the firstembodiment referring to FIGS. 1 to 5, so that the straight pin part 66 bcan be easily restored to the original form without suffering bending orbreakage in the operation for inserting a band connecting pin ofwatchband or adjusting the same.

Nextly, the operation of the thus constructed tool for wristwatch 60will be described with reference to FIGS. 20 and 21.

The tool for wristwatch 60 according to this fifth embodiment isfundamentally one used for removing a connecting pin in which aconnecting pin is not completely drawn off from a band connecting pininsertion hole of watchband, after the removing operation, by using thetool for wristwatch 20 of the first embodiment as shown in FIGS. 1 to 5,the tool for wristwatch 20 together with pliers according to the secondembodiment as shown in FIG. 6, and the tool for wristwatch 40 of thefourth embodiment as shown in FIGS. 10 to 15.

However, where a connecting pin can be removed from a watchband withoutthe need to use the tool for wristwatch 20, 40, the tool for wristwatch60 can naturally be employed in the removing of connecting pin.

Now, the tool for wristwatch 60 is in its initial condition such thatthe straight pin part 66 b of the front end portion of the removing pin66 is not protruded from the through hole 64 a (through hole 62 b) whichis provided at the center of the abutment member 64 of the lower tubebody 62 as shown in FIG. 20. From this state, the threaded engagementcondition between the inside threaded part 62 a provided on the innerperiphery of the upper end portion of the lower tube body 62 and theoutside threaded part 61 b of the upper tube body 61 are regulated byrotating the threaded parts 62 a, 61 b in opposite directions from eachother so as to loosen the screwing condition, while holding the uppertube body 61 and the lower tube body 62.

As a result, as shown in FIG. 21, the a length of the straight pin part66 b of the front end portion of the removing pin 66 is regulated sothat the straight pin part 66 b is protruded from the through hole 64 aprovided at the center of the abutment member 64 of the lower tube body62.

Then, in the state that a connecting pin is not completely drawn offfrom a band connecting pin insertion hole of watchband asaforementioned, the straight pin part 66 b of the front end portion ofthe removing pin 66 is pushed into the band connecting pin insertionhole by hand or the impact of a hammer or the like. As a result, theconnecting pin can be completely drawn off from the band connecting pininsertion hole.

After the use, the threaded engaging condition between the insidethreaded part 62 a provided on the inner periphery of the upper endportion of the lower tube body 62 and the outside threaded part 61 b ofthe upper tube body 61 is regulated by rotating the threaded parts 62 a,61 b in opposition directions from each other so as to fasten thethreaded engaging condition, while holding the upper tube body 61 andthe lower tube body 62. As a result, the tool for wristwatch 60 may berestored to the initial condition such that the straight pin part 66 bof the front end portion of the removing pin 66 is not protruded fromthe through hole 64 a which is provided at the center of the abutmentmember 64 of the lower tube body 62 as shown in FIG. 20.

In addition, the removing pin 66 is so constructed that the type thereofcan be selected and its replacement can be effected by detachablyscrewing the upper-end threaded part 66 a of the removing: pin 66 withthe inside threaded part 61 a of the upper tube body 61.

The type of removing pin 66 is not limited to the removing pin 66 havingthe straight pin part 66 b at the front end portion thereof, and, forexample, removing pin 66 of push pin configuration having recessed part52 h at the front end thereof as shown in FIGS. 16 and 17.

With respect to the thus constructed tool for wristwatch 60 according tothe fifth embodiment, the screwing condition between the inside threadedpart 62 a provided on the inner periphery of upper end portion of thelower tube body 62 and the outside threaded part 61 b of the upper tubebody 61 is regulated. As a result, the length of protrusion of thestraight pin part 66 b of the front end portion of the removing pin 66from the through hole 64 a provided at the center of the abutment member64 of the lower tube body 62 can be easily regulated.

Heretofore, tool for wristwatch having long straight pin parts have beenemployed, so that breakage of removing pins has often been experienced.However, with respect to the tool for wristwatch 60 of the presentinvention, since the protruded straight pin part 66 b can be adjusted toappropriate length, the occurrence of removing pin breakage has markedlybeen reduced.

The tool for wristwatch 60 is used for removing connecting pin in whicha connecting pin is not completely drawn off from a band connecting pininsertion hole of watchband, after the removing operation by using thetool for wristwatch 20 and 40. Thereafter, the straight pin part 66 b ofthe front end portion of the removing pin 66 is pushed into the bandconnecting pin insertion hole so that the connecting pin can be easilyand completely drawn off from the band connecting pin insertion hole.Therefore, the tool for wristwatch is extremely convenient.

In addition, the tool for wristwatch 60 of the present invention cannaturally be used in the press insertion of a connecting pin in a bandconnecting pin insertion hole of watchband.

Nextly, the sixth embodiment of the present invention will be described.

FIG. 22 is a top view of a wristwatch tool set for accommodating thetool for wristwatch according to the present invention. FIG. 23 is aperspective view of a hold guide member included in the wristwatch toolset of FIG. 22. FIG. 24 is a perspective view showing one manner ofoperation for removing a connecting pin from a band connecting pininsertion hole of watchband with the use of the tool for wristwatch andhold guide member of FIG. 22.

In FIG. 22, numeral 70 generally denotes a wristwatch tool set foraccommodating the tool for wristwatch according to the presentinvention.

The wristwatch tool set 70 has substantially the shape of a box, andincludes underlying box main body 71, cover member 73 openably securedto one side of the box main body 71 by means of hinge member 72, andaccommodation member 75 fitted in box part 74 of the box main body 71.

The underlying box main body 71 and the cover member 73 are soconstructed that the cover member 73 can be closed and fixed bydetachably interlocking lock piece 71 b, which protrudes from front sidewall 71 a of the box main body 71, in recessed part for lock 73 b, whichis provided in front side wall 73 a of the cover member 73.

The upper surface side of the accommodation member 75 is provided withfirst recessed part for accommodation 76 for accommodating the bandconnecting pin removing tool 40, which is the fourth form of tool forwristwatch of the present invention as shown in FIG. 10, second recessedpart for accommodation 77 for accommodating the band connecting pinremoving auxiliary tool 60, which is the fifth form of tool forwristwatch as shown in FIG. 18, third recessed part for accommodation 78for accommodating the removing pin 52 as shown in FIG. 15, and fourthrecessed part for accommodation 79 for accommodating the push pin 52′ asshown in FIG. 16.

Further, the upper surface side of the accommodation member 75 isprovided with fifth recessed part for accommodation 80 for accommodatingthe hold guide member 81.

The accommodation member 75 is constituted of, for example, a flexiblematerial such as a sponge, a foam or the like so that the marring ofband connecting pin removing tools 40, 60, removing pin 52 and push pin52′ by collision to each other during carriage can be avoided.

In this embodiment, for the ease of carriage, the band connecting pinremoving tool 40 is fitted with clip member 56 c of the same structureas that of a fountain pen clip, so that the band connecting pin removingtool 40 can be held on a pocket or the like.

Further, in this embodiment, the band connecting pin removing tool 40fitted with the removing pin 52 in advance is accommodated in the firstrecessed part for accommodation 76. The removing pin 52, not shown, isdetachably fitted with cylindrical protective member 86 so as to preventthe marring thereof.

On the other hand, the hold guide member 81 has substantially the shapeof a clip, and comprises a pair of clip hold members 82, 83 andconnecting part 84 which couples the clip hold members 82, 83 at baseend portions in curved form to thereby impart elasticity.

The respective inner end portions 82 a, 83 a of the clip hold members82, 83 abut each other, so that respective front end portions 82 b, 83 bof the clip hold members 82, 83 are in open condition.

Moreover, on the outside surface of the respective front end portions 82b, 83 b of the clip hold members 82, 83, respective tapered surfaces 82c, 83 c are formed so as to facilitate holding by fingers.

At the inside of the connecting part 84 of the clip hold members 82, 83,pin catcher part 85 which is a recessed part of substantiallycylindrical through hole configuration is provided. As shown in FIG.23(B), the pin catcher part 85 is adapted to hold the tip part (headpart) 96 of connecting pin 94 so as to prevent the dropping and missingof connecting pin 94 when removing a connecting pin from a bandconnecting pin insertion hole.

Although the material of the hold guide member 81 is not particularlylimited, it is preferred that the hold guide member 81 should beconstituted of a flexible material, for example, a rubber such assilicone rubber or urethane rubber, or a synthetic resin such aspolyethylene or polypropylene, from the viewpoint that marring of thewristwatch band at holding thereof can be avoided.

The thus constructed hold guide member 81 can appropriately be used inthe operation for, for example, removing a connecting pin from a bandconnecting pin insertion hole of watchband 92 of wristwatch 90, by usingthe tool for wristwatch 40 and hold guide member 81 of FIG. 22, as shownin FIG. 24.

Namely, as shown in FIG. 24, the hold guide member 81 is grasped by handand the watchband 92 of wristwatch 90 is fixed in the state that it isinterposed between the clip hold members 82, 83. Then, the tool forwristwatch 40 is applied thereto and a connecting pin is removed from aband connecting pin insertion hole of watchband 92 of wristwatch 90 inthe manner mentioned above.

The use of this hold guide member 81 is not limited to the aboveremoving operation by using the tool for wristwatch 40, and the holdguide member 81 can be used in the push insertion operation by using thetool for wristwatch 40 together with the push pin 52′, and can be alsoused in the removing operation by using the tool for wristwatch 60.

By using this hold guide member 81 at the time of removing operation orpush insertion operation, the watchband 92 of wristwatch 90 can be fixedin the state that it is interposed between members of the hold guidemember 81. Therefore, the operation efficiency can be strikinglyenhanced.

Moreover, with respect to this wristwatch tool set 70, a set of bandconnecting pin removing tools 40, 60, removing pin 52, push pin 52′ andhold guide member 81 are accommodated in the accommodation recessedparts 76 to 80 of the accommodation member 75 which is fitted in the boxpart 74 of the box main body 71 thereof. Therefore, the wristwatch toolset 70 is convenient for carriage and is also improved in any ofoperations such as removing and push insertion, thereby enhancing thegeneral applicability.

In this embodiment, a set of band connecting pin removing tools 40, 60,removing pin 52, push pin 52′ and hold guide member 81 are accommodatedin the accommodation recessed parts 76 to 80 of the accommodation member75 which is fitted in the box part 74 of the box main body 71 thereof.However, the component set is not limited to the above, and canappropriately be changed. For example, the wrench 31 can further beaccommodated in the wristwatch tool set 70.

1. A tool for wristwatch, employed to remove a band connecting pin, acase back of wristwatch case or the like, said tool comprising: asubstantially cylindrical tool main body having an inside wall, providedthereinside: a sliding shaft having a front end adapted to permitreplaceable securing of a wristwatch tool component, said sliding shafthaving the front end protruding from the tool main body; and hammeringmeans, said hammering means comprising: a compression spring, and ahammering member adapted to be energized and slid toward the slidingshaft by the compression spring, and a trigger member capable ofreleasing a spring force of the compression spring when the compressionspring has reached a predetermined compression level, the hammeringmember or the trigger member being urged so that it becomes biased tothe inside wall of the tool main body, said sliding shaft and saidhammering means so arranged that when the hammering member or thetrigger member is urged from the biased position to an erect position,an instantaneous large force is applied to the wristwatch tool componentby hammering a rear end of the sliding shaft by means of the hammeringmeans.
 2. The tool for wristwatch as claimed in claim 1, wherein thetool main body comprises a head part tube body, a center tube bodythreadedly engaged with the head part tube body, and a tip tube bodythreadedly engaged with the center tube body, wherein inside of thecenter tube body, a partition part having a small diameter hole isformed.
 3. The tool for wristwatch as claimed in claim 2, wherein at theside of the tip tube body of the partition part, a slant face, whichextends from the small diameter hole to an inside wall of the centertube body, is formed.
 4. The tool for wristwatch as claimed in claim 3,wherein the hammering member is disposed on the head part tube body sideof the partition part, the hammering member being provided with a centerhole; and wherein the trigger member is disposed on the tip tube bodyside of the partition part, the trigger member comprising: a triggershaft having a small diameter part and a large diameter part, the smalldiameter part adapted to be inserted in the center hole of the hammeringmember, the large diameter part adapted to pass through the smalldiameter hole of the partition part, the large diameter part broughtinto contact with the rear end of the sliding shaft, and a deformed coilspring capable of energizing the trigger shaft toward the sliding shaftwhile slanting the trigger shaft, the slanted trigger shaft arranged tocompress the compression spring through the hammering member by pressingof the front end of the sliding shaft, the trigger shaft arranged tostand erect in the moment that the large diameter part of the triggershaft is fitted in the small diameter hole.
 5. The tool for wristwatchas claimed in claim 2, wherein the compression spring is disposed in thecenter tube body and the head part tube body, and the spring force ofthe compression spring is adjustable by regulating a length of threadedengagement of the center tube body with the head tube body.
 6. The toolfor wristwatch as claimed in claim 1, further comprising pliers having aone-side functioning part and an other-side functioning part, wherein: ahead part of the tool for wristwatch engages with the inside of theone-side functioning part of the pliers, and the tool main body or thesliding shaft is arranged so as to pass through a through hole of theother-side functioning part of the pliers, the tool for wristwatchfurther comprising a spring capable of energizing the tool main bodytoward the one-side functioning part and a jig for fixing a wristwatchexterior part arranged outside the other-side functioning part.
 7. Thetool for wristwatch as claimed in claim 1, wherein the securing of thewristwatch tool component to the front end of the sliding shaft isaccomplished by at least one of insertion of a shaft in a shaft holeunder pressure, screwing of a shaft in a shaft hole with a set screwhole, engagement of an external thread with an internal thread,interlock of a protrudent part with a recessed part and interlock of ataper shaft with a bearing.
 8. The tool for wristwatch as claimed inclaim 7, wherein at the front end portion of the sliding shaft, aninterlock groove for securing the wristwatch tool component is formed,at the center of the wristwatch tool component, a lock hole is formedand inside of the lock hole, a recessed groove is formed, and an O-ringmember consisting of an elastic member is fitted in the recessed groove,the O-ring member arranged so as to be fitted in the interlock groove ofthe sliding shaft, thereby enabling detachably securing the wristwatchtool component to the front end portion of the sliding shaft.
 9. Thetool for wristwatch as claimed in claim 1, wherein the base end portionof the wristwatch tool component is provided with an abutment memberconsisting of a flexible member.
 10. The tool for wristwatch as claimedin claim 1, wherein a pin or deformed pin for removing a band connectingpin as the wristwatch tool component is detachably secured.
 11. The toolfor wristwatch as claimed in claim 10, wherein the pin for removing aband connecting pin is constituted of a superelastic metallic materialconsisting of an alloy which contains nickel/titanium (Ni—Ti) ornickel/titanium/cobalt (Ni—Ti—Co) as a principal component.
 12. The toolfor wristwatch as claimed in claim 10, wherein the pin for removing aband connecting pin is a push pin having a front end in the shape of arecessed part of a cone.
 13. The tool for wristwatch as claimed in claim10, wherein the pin for removing a band connecting pin is a push pinhaving a front end provided with a recessed part consisting of a blindhole adapted to have the connecting pin fitted therein.
 14. The tool forwristwatch as claimed in claim 1, wherein a wrench for removing a bezelor a case back as the wristwatch tool component is detachably secured.15. The tool for wristwatch as claimed in claim 3, wherein the hammeringmember is disposed on the head part tube body side of the partitionpart, the hammering member being provided with a center hole, andwherein the trigger member comprises: a trigger shaft being disposedunder the partition part of the center tube body, the trigger shaft atits upper end being provided with an abutment surface of slanted coneshape, the trigger shaft being provided with a vertical through hole, anupper part of the sliding shaft, the upper part adapted to pass throughthe through hole of the trigger shaft and adapted to be fitted in thecenter hole of the hammering member and the hammering member having itsupper end portion formed into substantially a dome configuration, thetool for wristwatch is arranged that the hammering member is energizeddownward by the compression spring, whereby the lower end of thehammering member is abutted to the abutment surface of slanted coneshape of the upper end of the trigger shaft, resulting that an axialcenter of the hammering member is biased, the tool for wristwatch is soarranged that the upper part of the sliding shaft raises the hammeringmember by pressing of the front end of the sliding shaft, whereby thecompression spring is compressed by the hammering member having beenbiased toward the inside wall, and the upper end portion ofsubstantially dome configuration of the raised hammering member isguided by the inside wall of the through hole of the center tube body,whereby the axial center of the hammering member is moved toward thecenter, with the result that the hammering member stands erect.
 16. Thetool for wristwatch as claimed in claim 15, wherein the hammering memberis raised in accordance with rise of the sliding shaft so that a slantface provided on a large diameter part of the lower end portion of thehammering member is guided by the slant face part of the partition part,whereby the axial center of the hammering member is gradually departedfrom the inner wall and shifts toward center so that the hammeringmember is thrust upward.
 17. The tool for wristwatch as claimed in claim15, wherein a compression coil spring is interposed between a lower endof the trigger shaft and the sliding shaft, the tool for wristwatch isso arranged that the trigger shaft is energized upward by a spring forceof the compression coil spring, whereby the abutment surface of slantedcone shape of the upper end of the trigger shaft is abutted to the largediameter part of the lower end portion of the hammering member, the toolfor wristwatch is arranged that the sliding shaft is energized downwardby the spring force of the compression coil spring, whereby the frontend of the sliding shaft protrudes from the tip tube body.
 18. A toolfor wristwatch, employed to remove a connecting pin from a bandconnecting pin insertion hole of watchband, said tool comprising: asubstantially cylindrical upper tube body having an inside threaded partprovided on an inside wall of lower end portion thereof and having anoutside threaded part provided on an outside wall thereof, a removingpin detachably and threadedly engaging the inside threaded part of theupper tube body, and a substantially cylindrical lower tube body oftaper outline being detachably fitted to a lower portion of the uppertube body by threadedly engaging an inside threaded part provided on aninner periphery of the lower tube body with the outside threaded part ofthe upper tube body, the tool for wristwatch is so arranged that alength of protrusion of a front end portion of the removing pin from athrough hole of front end of the lower tube body can be adjusted byregulating a condition of threaded engagement of the inside threadedpart provided on the inner periphery of upper end portion of the lowertube body with the outside threaded part of the upper tube body.
 19. Atool for wristwatch, employed to remove a connecting pin in the eventthat a connecting pin is not completely drawn off from a band connectingpin insertion hole of watchband, after the connecting pin is removedfrom the band connecting pin insertion hole by using the tool forwristwatch claimed in claim 1, said tool comprising: a substantiallycylindrical upper tube body having an inside threaded part provided onan inside wall of lower end portion thereof and having an outsidethreaded part provided on an outside wall thereof, a removing pin beingdetachably and threadedly engaged with the inside threaded part of theupper tube body, and a substantially cylindrical lower tube body oftaper outline being detachably fitted to a lower portion of the uppertube body by threadedly engaging an inside threaded part provided on aninner periphery of the lower tube body with the outside threaded part ofthe upper tube body, the tool for wristwatch is so arranged that alength of protrusion of a front end portion of the removing pin from athrough hole of front end of the lower tube body can be adjusted byregulating a condition of threaded engagement of the inside threadedpart provided on the inner periphery of upper end portion of the lowertube body with the outside threaded part of the upper tube body.
 20. Thetool for wristwatch as claimed in claim 18, wherein at the front end ofthe lower tube body, an abutment member consisting of a flexible memberis disposed.
 21. The tool for wristwatch as claimed in claim 18, whereinthe removing pin is constituted of a superelastic metallic materialconsisting of an alloy which contains nickel/titanium (Ni—Ti) ornickel/titanium/cobalt (Ni—Ti—Co) as a principal component.